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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/scummsys.h"
#include "common/engine.h"
#include "common/file.h"
#include "sky/skydefs.h"
#include "sky/sky.h"
#include "sky/rnc_deco.h"
#define no_of_files_hd 1600
#define no_of_files_cd 5200
#define max_files_in_list 60
const char *data_file_name = "sky.dsk";
const char *dinner_file_name = "sky.dnr";
uint8 *dinner_table_area, *fixed_dest, *file_dest, *comp_dest;
uint32 dinner_table_entries, file_flags, file_offset, file_size, decomp_size, comp_file;
uint16 build_list[max_files_in_list];
uint32 loaded_file_list[max_files_in_list];
File *data_disk_handle = new File();
File *dnr_handle = new File();
void SkyState::initialise_disk()
{
uint32 entries_read;
dnr_handle->open(dinner_file_name, _gameDataPath);
if (dnr_handle->isOpen() == false)
error("Could not open %s%s!\n", _gameDataPath, dinner_file_name);
if (!(dinner_table_entries = dnr_handle->readUint32LE()))
error("Error reading from sky.dnr!\n"); //even though it was opened correctly?!
debug(1, "Entries in dinner table: %d", dinner_table_entries);
if (dinner_table_entries > 1600)
_isCDVersion = true;
else
_isCDVersion = false;
dinner_table_area = (uint8 *)malloc(dinner_table_entries * 8);
entries_read = dnr_handle->read(dinner_table_area, 8 * dinner_table_entries) / 8;
if (entries_read != dinner_table_entries)
warning("bytes_read != dinner_table_entries. [%d/%d]\n", entries_read, dinner_table_entries);
data_disk_handle->open(data_file_name, _gameDataPath);
if (data_disk_handle->isOpen() == false)
error("Error opening %s%s!\n", _gameDataPath, data_file_name);
}
//load in file file_nr to address dest
//if dest == NULL, then allocate memory for this file
uint16 *SkyState::load_file(uint16 file_nr, uint8 *dest)
{
uint8 cflag;
int32 bytes_read;
uint8 *file_ptr, *inputPtr, *outputPtr;
dataFileHeader file_header;
#ifdef file_order_chk
warning("File order checking not implemented yet!\n");
#endif
comp_file = file_nr;
debug(1, "load file %d,%d (%d)", (file_nr >> 11), (file_nr & 2047), file_nr);
file_ptr = (uint8 *)get_file_info(file_nr);
if (file_ptr == NULL) {
printf("File %d not found!\n", file_nr);
return NULL;
}
file_flags = READ_LE_UINT32((file_ptr + 5));
file_size = file_flags & 0x03fffff;
file_offset = READ_LE_UINT32((file_ptr + 2)) & 0x0ffffff;
cflag = (uint8)((file_offset >> (23)) & 0x1);
file_offset = (((1 << (23)) ^ 0xFFFFFFFF) & file_offset);
if (cflag)
file_offset <<= 4;
fixed_dest = dest;
file_dest = dest;
comp_dest = dest;
if (dest == NULL) //we need to allocate memory for this file
file_dest = (uint8 *)malloc(file_size);
data_disk_handle->seek(file_offset, SEEK_SET);
#ifdef file_order_chk
warning("File order checking not implemented yet!\n");
#endif
//now read in the data
bytes_read = data_disk_handle->read(file_dest, 1*file_size);
if (bytes_read != (int32)file_size)
printf("ERROR: Unable to read %d bytes from datadisk (%d bytes read)\n", file_size, bytes_read);
cflag = (uint8)((file_flags >> (23)) & 0x1);
//if cflag == 0 then file is compressed, 1 == uncompressed
if (!cflag) {
debug(1, "File is compressed...");
memcpy(&file_header, file_dest, sizeof(struct dataFileHeader));
if ( (uint8)((FROM_LE_16(file_header.flag) >> 7) & 0x1) ) {
debug(1, "with RNC!");
decomp_size = (FROM_LE_16(file_header.flag) & 0xFFFFFF00) << 8;
decomp_size |= FROM_LE_16((uint16)file_header.s_tot_size);
if (fixed_dest == NULL) // is this valid?
comp_dest = (uint8 *)malloc(decomp_size);
inputPtr = file_dest;
outputPtr = comp_dest;
if ( (uint8)(file_flags >> (22) & 0x1) ) //do we include the header?
inputPtr += sizeof(struct dataFileHeader);
else {
memcpy(outputPtr, inputPtr, sizeof(struct dataFileHeader));
inputPtr += sizeof(struct dataFileHeader);
outputPtr += sizeof(struct dataFileHeader);
}
RncDecoder rncDecoder;
int32 unPackLen = rncDecoder.unpackM1(inputPtr, outputPtr, 0);
debug(2, "UnpackM1 returned: %d", unPackLen);
if (unPackLen == 0) { //Unpack returned 0: file was probably not packed.
if (fixed_dest == NULL)
free(comp_dest);
return (uint16 *)file_dest;
}
if (! (uint8)(file_flags >> (22) & 0x1) ) { // include header?
unPackLen += sizeof(struct dataFileHeader);
if (unPackLen != (int32)decomp_size) {
debug(1, "ERROR: invalid decomp size! (was: %d, should be: %d)", unPackLen, decomp_size);
}
}
if (fixed_dest == NULL)
free(file_dest);
} else
debug(1, "but not with RNC! (?!)");
} else
return (uint16 *)file_dest;
return (uint16 *)comp_dest;
}
uint16 *SkyState::get_file_info(uint16 file_nr)
{
uint16 i;
uint16 *dnr_tbl_16_ptr = (uint16 *)dinner_table_area;
for (i = 0; i < dinner_table_entries; i++) {
if (READ_LE_UINT16(dnr_tbl_16_ptr + (i * 4)) == file_nr) {
debug(1, "file %d found!", file_nr);
return (dnr_tbl_16_ptr + (i * 4));
}
}
// if file is speech file then return NULL if not found
printf("get_file_info() - speech file support not implemented yet!\n");
return (uint16 *)NULL;
}
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